#!/usr/bin/env python3
# -*- coding: utf-8 -*-
"""Constants"""

import os
from typing import Final

TEXT_SIZE_MAX: Final[int] = 2048

POW_DIFFICULTY: Final[int] = 5
POW_DIFFICULTY_STR: Final[str] = "0" * POW_DIFFICULTY
POW_EXPIRES: Final[int] = 60 * 16  # 16 minutes
POW_NONCE_SIZE: Final[int] = 12

KEY_FILENAME: Final[str] = ".key"
KEY_SIZE: Final[int] = 128

SOURCE: Final[str] = os.environ.get("SOURCE", "http://127.0.0.1/")